feat(config): T-1285 — the atlas authoring verbs, and a verify nobody checked

reach atlas db / names / systems-done / check / verify / commit-and-sync /
update-field / flatness. Eight scripts retired, five of them bash. verify
reproduces the original exactly: 2 errors across 301 proposals, exit 1.

The binary has more verbs than its wrapper documented. The bash usage text
listed four; atlas-commit-and-sync calls four more it never mentioned. All
eight are declared so reach atlas --help is a complete index, and unknown verbs
are still forwarded — a hand-maintained list falls behind the binary it
describes, so rejecting on it would break the day someone adds a subcommand.

commit-and-sync now stages by default and commits only with --commit. Nothing
else in reach writes to git history, and committing as a side effect of "sync"
is a different risk class from writing a file; the default prints the message
it would use, leaving the decision where it was.

Two real bugs found in that script while porting it. It ran atlas-verify and
never checked the exit code, so a proposal that FAILED verification was still
wiped, committed and synced — bad data in systems.db is far harder to undo than
a failed command, and it now refuses. And it hardcoded a pinned
"Co-Authored-By: Claude Opus 4.6" into every atlas commit, which the git-commit
skill names as the root cause of attribution drift.

update-field gains two guards the original lacked. Its field→table map lived
inside a bash heredoc string where nothing could check it, and an unknown field
produced an UPDATE against a table of None; it now names the nine accepted
fields. And it checks rowcount, so a system_id that does not exist is a failure
rather than a silent no-op reported as success.

The three Python scripts moved with the usual treatment — prints to console
events, argparse replaced by typed functions, __file__ roots to
config.repo_root(). No root bug this time: checked before moving rather than
after, three domains running.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

tooling/main.py

@@ -55,6 +55,10 @@ DOMAINS: dict[str, tuple[str, str]] = {
         "tooling.domains.validate.router:app",
         "Content, checklists and RON against their schemas",
     ),
+    "atlas": (
+        "tooling.domains.atlas.router:app",
+        "The spatial ladder — authoring, inspection and the DB",
+    ),
     "godot": (
         "tooling.domains.godot.router:app",
         "Does the client parse, and does it parse cold",